Alert archive / South Dakota / Winter Storm Watches in 2017
Winter Storm Watch 3, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this winter storm watch at Feb 21, 2017, 3:59 PM CST for 4 states. It took effect at Feb 23, 2017, 12:00 PM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Feb 21, 2017, 3:59 PM CST (21:59 UTC)
- In effect from
- Feb 23, 2017, 12:00 PM CST
- Expired
- Feb 23, 2017, 4:14 AM CST
- In force
- Issued by
- NWS Sioux Falls, SD
All 45 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Dakota County, NE, Dixon County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 16 km from the middle of the area, began a volume at 21:58 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 10.0 hours before the alert went out and 202 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1997 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 317 m²/s²
- 0-3 km storm-relative helicity
- 337 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
333 WWUS43 KFSD 212159 WSWFSD URGENT - WINTER WEATHER MESSAGE National Weather Service Sioux Falls SD 359 PM CST Tue Feb 21 2017 IAZ001>003-012>014-020>022-MNZ071-072-080-081-089-090-097-098- NEZ013-SDZ040-050-054>071-220600- /O.NEW.KFSD.WS.A.0003.170224T0000Z-170225T0000Z/ Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Lincoln MN-Lyon MN-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Brookings-Gregory-Miner-Lake-Moody-Brule- Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Lincoln SD-Bon Homme-Yankton-Clay SD-Union- 359 PM CST Tue Feb 21 2017 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... The National Weather Service in Sioux Falls has issued a Winter Storm Watch, which is in effect from Thursday evening through Friday afternoon. * TIMING...Rain will begin mixing with snow midday Thursday, then change entirely to snowfall Thursday evening. Snow will continue into Friday, before gradually tapering off in the afternoon. * ACCUMULATIONS...Storm total snow accumulations of 6 to 10 inches are possible. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 30 mph on Thursday night and Friday. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$
5 follow-up statements
103 WWUS43 KFSD 220411 WSWFSD URGENT - WINTER WEATHER MESSAGE National Weather Service Sioux Falls SD 1011 PM CST Tue Feb 21 2017 IAZ001>003-012>014-020>022-MNZ071-072-080-081-089-090-097-098- NEZ013-SDZ040-050-054>071-221215- /O.CON.KFSD.WS.A.0003.170224T0000Z-170225T0000Z/ Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Lincoln MN-Lyon MN-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Brookings-Gregory-Miner-Lake-Moody-Brule- Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Lincoln SD-Bon Homme-Yankton-Clay SD-Union- 1011 PM CST Tue Feb 21 2017 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... * TIMING...Rain will begin mixing with snow midday Thursday, then change entirely to snowfall Thursday evening. Snow will continue into Friday, before gradually tapering off in the afternoon. * ACCUMULATIONS...Storm total snow accumulations of 6 to 10 inches are possible. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 30 mph on Thursday night and Friday. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$
759 WWUS43 KFSD 220937 WSWFSD URGENT - WINTER WEATHER MESSAGE National Weather Service Sioux Falls SD 337 AM CST Wed Feb 22 2017 SDZ052-221745- /O.EXB.KFSD.WS.A.0003.170223T1800Z-170225T0000Z/ Jerauld- 337 AM CST Wed Feb 22 2017 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY AFTERNOON... The National Weather Service in Sioux Falls has issued a Winter Storm Watch, which is in effect from Thursday afternoon through Friday afternoon. * TIMING...Snow will spread into the area by midday Thursday, then continue heavy at times Thursday night into Friday. Snow should diminish Friday afternoon. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 35 mph on Thursday night and Friday. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$ IAZ031-032-NEZ014-221745- /O.EXB.KFSD.WS.A.0003.170224T0000Z-170225T0600Z/ Woodbury-Ida-Dakota- 337 AM CST Wed Feb 22 2017 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING... The National Weather Service in Sioux Falls has issued a Winter Storm Watch, which is in effect from Thursday evening through Friday evening. * TIMING...Rain will change to snow Thursday night, with snow continuing heavy at times Friday. Snow should diminish Friday night. * ACCUMULATIONS...Storm total snow accumulations of 6 inches are possible. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 35 mph Thursday night through Friday evening. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$ SDZ038-039-053-221745- /O.EXA.KFSD.WS.A.0003.170224T0000Z-170225T0000Z/ Beadle-Kingsbury-Sanborn- 337 AM CST Wed Feb 22 2017 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... The National Weather Service in Sioux Falls has issued a Winter Storm Watch, which is in effect from Thursday evening through Friday afternoon. * TIMING...Snow will spread into the area Thursday afternoon, then continue heavy at times Thursday night into Friday. Snow should diminish Friday afternoon. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph on Thursday night and Friday. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$ SDZ050-057-058-063-064-221745- /O.EXT.KFSD.WS.A.0003.170223T1800Z-170225T0000Z/ Gregory-Brule-Aurora-Charles Mix-Douglas- 337 AM CST Wed Feb 22 2017 ...WINTER STORM WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY AFTERNOON... * TIMING...Snow will spread into the area by midday Thursday, then continue heavy at times Thursday night into Friday. Snow should diminish Friday afternoon. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 35 mph on Thursday night and Friday. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$ IAZ001>003-012>014-020>022-MNZ071-072-080-081-089-090-097-098- 221745- /O.EXT.KFSD.WS.A.0003.170224T0000Z-170225T0600Z/ Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Lincoln MN-Lyon MN-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock- 337 AM CST Wed Feb 22 2017 ...WINTER STORM WATCH NOW IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING... * TIMING...A mix of rain and snow Thursday afternoon will change to all snow Thursday evening. Snow will continue heavy at times Thursday night and Friday, before gradually tapering off Friday night. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 30 mph Thursday night, with gusts over 40 mph possible on Friday into Friday evening. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$ NEZ013-SDZ040-054>056-059>062-065>071-221745- /O.CON.KFSD.WS.A.0003.170224T0000Z-170225T0000Z/ Dixon-Brookings-Miner-Lake-Moody-Davison-Hanson-McCook-Minnehaha- Hutchinson-Turner-Lincoln SD-Bon Homme-Yankton-Clay SD-Union- 337 AM CST Wed Feb 22 2017 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... * TIMING...A mix of rain and snow Thursday afternoon will change to all snow Thursday evening. Snow will continue heavy at times Thursday night and Friday, before gradually tapering off Friday evening. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 35 mph on Thursday night and Friday. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$
562 WWUS43 KFSD 222122 WSWFSD URGENT - WINTER WEATHER MESSAGE National Weather Service Sioux Falls SD 322 PM CST Wed Feb 22 2017 SDZ050-052-057-058-063-064-230530- /O.CAN.KFSD.WS.A.0003.170223T1800Z-170225T0000Z/ /O.NEW.KFSD.BZ.A.0001.170223T1800Z-170225T0000Z/ Gregory-Jerauld-Brule-Aurora-Charles Mix-Douglas- 322 PM CST Wed Feb 22 2017 ...BLIZZARD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY AFTERNOON... ...WINTER STORM WATCH IS CANCELLED... The National Weather Service in Sioux Falls has issued a Blizzard Watch, which is in effect from Thursday afternoon through Friday afternoon. The Winter Storm Watch has been cancelled. * TIMING...Snow will spread into the area by midday Thursday, then continue heavy at times Thursday night into Friday. Snow should diminish Friday afternoon. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph by Thursday afternoon into Friday. Visibility is expected to be reduced to less than a quarter of a mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Watch means there is a potential for falling and/or blowing snow with strong winds and extremely poor visibilities. This can lead to whiteout conditions and make travel very dangerous. && $$ NEZ013-SDZ053>056-059>062-065>071-230530- /O.CAN.KFSD.WS.A.0003.170224T0000Z-170225T0000Z/ /O.NEW.KFSD.BZ.A.0001.170224T0000Z-170225T0000Z/ Dixon-Sanborn-Miner-Lake-Moody-Davison-Hanson-McCook-Minnehaha- Hutchinson-Turner-Lincoln SD-Bon Homme-Yankton-Clay SD-Union- 322 PM CST Wed Feb 22 2017 ...BLIZZARD WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... ...WINTER STORM WATCH IS CANCELLED... The National Weather Service in Sioux Falls has issued a Blizzard Watch, which is in effect from Thursday evening through Friday afternoon. The Winter Storm Watch has been cancelled. * TIMING...A possible mix of rain and snow on Thursday afternoon will change to all snow by early Thursday evening. Snow will continue heavy at times Thursday night and Friday, before gradually tapering off Friday evening. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph on Thursday night and Friday. Visibility is expected to be reduced to less than a quarter of a mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Watch means there is a potential for falling and/or blowing snow with strong winds and extremely poor visibilities. This can lead to whiteout conditions and make travel very dangerous. && $$ IAZ001>003-012>014-020>022-MNZ071-072-080-081-089-090-097-098- NEZ014-230530- /O.CAN.KFSD.WS.A.0003.170224T0000Z-170225T0600Z/ /O.NEW.KFSD.BZ.A.0001.170224T0000Z-170225T0600Z/ Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Lincoln MN-Lyon MN-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dakota- 322 PM CST Wed Feb 22 2017 ...BLIZZARD WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING... ...WINTER STORM WATCH IS CANCELLED... The National Weather Service in Sioux Falls has issued a Blizzard Watch, which is in effect from Thursday evening through Friday evening. The Winter Storm Watch has been cancelled. * TIMING...A brief mix of rain and snow Thursday afternoon will change to all snow by early Thursday evening. Snow will continue heavy at times Thursday night and Friday, before gradually tapering off Friday night. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph Thursday night, with gusts over 45 mph possible on Friday into Friday evening. Visibility is expected to be reduced to less than a quarter of a mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Watch means there is a potential for falling and/or blowing snow with strong winds and extremely poor visibilities. This can lead to whiteout conditions and make travel very dangerous. && $$ SDZ038>040-230530- /O.CON.KFSD.WS.A.0003.170224T0000Z-170225T0000Z/ Beadle-Kingsbury-Brookings- 322 PM CST Wed Feb 22 2017 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... * TIMING...snow will develop across the area and become heavy at times by Thursday night and Friday, before gradually tapering off Friday evening. * ACCUMULATIONS...Storm total snow accumulations of 6 to 10 inches are likely. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 35 mph by Thursday afternoon into Friday. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$ IAZ031-032-230530- /O.CON.KFSD.WS.A.0003.170224T0000Z-170225T0600Z/ Woodbury-Ida- 322 PM CST Wed Feb 22 2017 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING... * TIMING...Rain will change to snow Thursday night, with snow continuing heavy at times Friday. Snow should diminish Friday night. * ACCUMULATIONS...Storm total snow accumulations of 6 to 10 inches are possible. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 35 mph Thursday night through Friday evening. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$
164 WWUS43 KFSD 230257 WSWFSD URGENT - WINTER WEATHER MESSAGE National Weather Service Sioux Falls SD 857 PM CST Wed Feb 22 2017 SDZ050-052-057-058-063-064-231100- /O.CON.KFSD.BZ.A.0001.170223T1800Z-170225T0000Z/ Gregory-Jerauld-Brule-Aurora-Charles Mix-Douglas- 857 PM CST Wed Feb 22 2017 ...BLIZZARD WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY AFTERNOON... * TIMING...Snow will spread into the area by midday Thursday, then continue heavy at times Thursday night into Friday. Snow should diminish Friday afternoon. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph by Thursday afternoon into Friday. Visibility is expected to be reduced to less than a quarter of a mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Watch means there is a potential for falling and/or blowing snow with strong winds and extremely poor visibilities. This can lead to whiteout conditions and make travel very dangerous. && $$ NEZ013-SDZ053>056-059>062-065>071-231100- /O.CON.KFSD.BZ.A.0001.170224T0000Z-170225T0000Z/ Dixon-Sanborn-Miner-Lake-Moody-Davison-Hanson-McCook-Minnehaha- Hutchinson-Turner-Lincoln SD-Bon Homme-Yankton-Clay SD-Union- 857 PM CST Wed Feb 22 2017 ...BLIZZARD WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... * TIMING...A possible mix of rain and snow on Thursday afternoon will change to all snow by early Thursday evening. Snow will continue heavy at times Thursday night and Friday, before gradually tapering off Friday evening. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph on Thursday night and Friday. Visibility is expected to be reduced to less than a quarter of a mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Watch means there is a potential for falling and/or blowing snow with strong winds and extremely poor visibilities. This can lead to whiteout conditions and make travel very dangerous. && $$ IAZ001>003-012>014-020>022-MNZ071-072-080-081-089-090-097-098- NEZ014-231100- /O.CON.KFSD.BZ.A.0001.170224T0000Z-170225T0600Z/ Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Lincoln MN-Lyon MN-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dakota- 857 PM CST Wed Feb 22 2017 ...BLIZZARD WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING... * TIMING...A brief mix of rain and snow Thursday afternoon will change to all snow by early Thursday evening. Snow will continue heavy at times Thursday night and Friday, before gradually tapering off Friday night. * ACCUMULATIONS...Storm total snow accumulations of 6 to 12 inches are likely, with amounts in excess of 12 inches possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph Thursday night, with gusts over 45 mph possible on Friday into Friday evening. Visibility is expected to be reduced to less than a quarter of a mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Watch means there is a potential for falling and/or blowing snow with strong winds and extremely poor visibilities. This can lead to whiteout conditions and make travel very dangerous. && $$ SDZ038>040-231100- /O.CON.KFSD.WS.A.0003.170224T0000Z-170225T0000Z/ Beadle-Kingsbury-Brookings- 857 PM CST Wed Feb 22 2017 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... * TIMING...Snow will develop across the area and become heavy at times by Thursday night and Friday, before gradually tapering off Friday evening. * ACCUMULATIONS...Storm total snow accumulations of 6 to 10 inches are likely. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 35 mph by Thursday afternoon into Friday. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$ IAZ031-032-231100- /O.CON.KFSD.WS.A.0003.170224T0000Z-170225T0600Z/ Woodbury-Ida- 857 PM CST Wed Feb 22 2017 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING... * TIMING...Rain will change to snow Thursday night, with snow continuing heavy at times Friday. Snow should diminish Friday night. * ACCUMULATIONS...Storm total snow accumulations of 6 to 10 inches are possible. * WIND AND VISIBILITY...Winds will increase from the north around 20 to 35 mph Thursday night through Friday evening. Visibility is expected to be reduced to less than a half mile at times while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$
735 WWUS43 KFSD 231014 WSWFSD URGENT - WINTER WEATHER MESSAGE National Weather Service Sioux Falls SD 414 AM CST Thu Feb 23 2017 NEZ013-SDZ056-062-067-070-071-231815- /O.UPG.KFSD.BZ.A.0001.170224T0000Z-170225T0000Z/ /O.NEW.KFSD.BZ.W.0001.170224T0000Z-170225T0000Z/ Dixon-Moody-Minnehaha-Lincoln SD-Clay SD-Union- 414 AM CST Thu Feb 23 2017 ...BLIZZARD WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM CST FRIDAY... The National Weather Service in Sioux Falls has issued a Blizzard Warning, which is in effect from 6 PM this evening to 6 PM CST Friday. The Blizzard Watch is no longer in effect. * TIMING...A possible mix of rain and snow this afternoon will change to all snow by early this evening. Snow will continue heavy at times Thursday night and Friday morning, before gradually tapering off Friday afternoon. * ACCUMULATIONS...Storm total snow accumulations averaging 6 to 12 inches are likely, with the heaviest amounts expected south of Highway 18 in northwest Iowa and extreme southeast South Dakota. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph tonight and Friday, with gusts to near 40 mph at times. Visibility will be reduced to less than a quarter mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds and poor visibilities are likely. This will lead to whiteout conditions...making travel extremely dangerous. Do not travel. If you must travel...have a winter survival kit with you. If you get stranded...stay with your vehicle. && $$ IAZ001-012-020-MNZ080-097-098-NEZ014-231815- /O.UPG.KFSD.BZ.A.0001.170224T0000Z-170225T0600Z/ /O.NEW.KFSD.BZ.W.0001.170224T0000Z-170225T0000Z/ Lyon IA-Sioux-Plymouth-Murray-Pipestone-Rock-Dakota- 414 AM CST Thu Feb 23 2017 ...BLIZZARD WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM CST FRIDAY... The National Weather Service in Sioux Falls has issued a Blizzard Warning, which is in effect from 6 PM this evening to 6 PM CST Friday. The Blizzard Watch is no longer in effect. * TIMING...A possible mix of rain and snow this afternoon will change to all snow by early this evening. Snow will continue heavy at times Thursday night and Friday morning, before gradually tapering off Friday afternoon. * ACCUMULATIONS...Storm total snow accumulations averaging 6 to 12 inches are likely, with the heaviest amounts expected south of Highway 18 in northwest Iowa and extreme southeast South Dakota. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph tonight and Friday, with gusts to near 40 mph at times. Visibility will be reduced to less than a quarter mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds and poor visibilities are likely. This will lead to whiteout conditions...making travel extremely dangerous. Do not travel. If you must travel...have a winter survival kit with you. If you get stranded...stay with your vehicle. && $$ IAZ002-003-013-014-021-022-MNZ081-089-090-231815- /O.UPG.KFSD.BZ.A.0001.170224T0000Z-170225T0600Z/ /O.NEW.KFSD.BZ.W.0001.170224T0000Z-170225T0600Z/ Osceola-Dickinson-O'Brien-Clay IA-Cherokee-Buena Vista-Cottonwood- Nobles-Jackson- 414 AM CST Thu Feb 23 2017 ...BLIZZARD WARNING IN EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT CST FRIDAY NIGHT... The National Weather Service in Sioux Falls has issued a Blizzard Warning, which is in effect from 6 PM this evening to midnight CST Friday night. The Blizzard Watch is no longer in effect. * TIMING...A possible mix of rain and snow this afternoon will change to all snow through this evening. Snow will continue heavy at times Thursday night and Friday, before gradually tapering off Friday evening. * ACCUMULATIONS...Storm total snow accumulations averaging 8 to 12 inches are likely, with some higher amounts possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph tonight, with gusts to near 45 mph at times late tonight into Friday. Visibility is expected to be reduced to less than a quarter of a mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds and poor visibilities are likely. This will lead to whiteout conditions...making travel extremely dangerous. Do not travel. If you must travel...have a winter survival kit with you. If you get stranded...stay with your vehicle. && $$ IAZ032-231815- /O.UPG.KFSD.WS.A.0003.170224T0000Z-170225T0600Z/ /O.NEW.KFSD.BZ.W.0001.170224T0000Z-170225T0600Z/ Ida- 414 AM CST Thu Feb 23 2017 ...BLIZZARD WARNING IN EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT CST FRIDAY NIGHT... The National Weather Service in Sioux Falls has issued a Blizzard Warning, which is in effect from 6 PM this evening to midnight CST Friday night. The Winter Storm Watch is no longer in effect. * TIMING...A possible mix of rain and snow this afternoon will change to all snow through this evening. Snow will continue heavy at times Thursday night and Friday, before gradually tapering off Friday evening. * ACCUMULATIONS...Storm total snow accumulations averaging 8 to 12 inches are likely, with some higher amounts possible. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph tonight, with gusts to near 45 mph at times late tonight into Friday. Visibility is expected to be reduced to less than a quarter of a mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds and poor visibilities are likely. This will lead to whiteout conditions...making travel extremely dangerous. Do not travel. If you must travel...have a winter survival kit with you. If you get stranded...stay with your vehicle. && $$ IAZ031-231815- /O.UPG.KFSD.WS.A.0003.170224T0000Z-170225T0600Z/ /O.NEW.KFSD.BZ.W.0001.170224T0000Z-170225T0000Z/ Woodbury- 414 AM CST Thu Feb 23 2017 ...BLIZZARD WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM CST FRIDAY... The National Weather Service in Sioux Falls has issued a Blizzard Warning, which is in effect from 6 PM this evening to 6 PM CST Friday. The Winter Storm Watch is no longer in effect. * TIMING...A possible mix of rain and snow this afternoon will change to all snow by late this evening. Snow will continue heavy at times Thursday night and Friday morning, before gradually tapering off Friday afternoon. * ACCUMULATIONS...Storm total snow accumulations averaging 6 to 12 inches are likely, with the heaviest amounts expected south of Highway 18 in northwest Iowa and extreme southeast South Dakota. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph tonight and Friday, with gusts to near 40 mph at times. Visibility will be reduced to less than a quarter mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds and poor visibilities are likely. This will lead to whiteout conditions...making travel extremely dangerous. Do not travel. If you must travel...have a winter survival kit with you. If you get stranded...stay with your vehicle. && $$ SDZ050-057-058-063-064-231815- /O.UPG.KFSD.BZ.A.0001.170223T1800Z-170225T0000Z/ /O.NEW.KFSD.WS.W.0003.170223T1800Z-170224T1800Z/ Gregory-Brule-Aurora-Charles Mix-Douglas- 414 AM CST Thu Feb 23 2017 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO NOON CST FRIDAY... The National Weather Service in Sioux Falls has issued a Winter Storm Warning for heavy snow and blowing snow, which is in effect from noon today to noon CST Friday. The Blizzard Watch is no longer in effect. * TIMING...Snow will spread into the area by midday today, becoming heavy at times this afternoon and evening. Snow should diminish through Friday morning. * ACCUMULATIONS...Storm total snow accumulations averaging 5 to 10 inches are likely, with the heaviest amounts expected near the Missouri River Valley. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 30 mph tonight and Friday, with gusts to near 35 mph at times. Visibility will be reduced to less than a half mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for heavy snow and blowing snow means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous...and visibilities will be limited further due to strong winds blowing snow around. Only travel in an emergency. If you must travel...keep an extra flashlight...food...and water in your vehicle in case of an emergency. && $$ SDZ059-231815- /O.UPG.KFSD.BZ.A.0001.170224T0000Z-170225T0000Z/ /O.NEW.KFSD.WS.W.0003.170223T1800Z-170224T1800Z/ Davison- 414 AM CST Thu Feb 23 2017 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO NOON CST FRIDAY... The National Weather Service in Sioux Falls has issued a Winter Storm Warning for heavy snow and blowing snow, which is in effect from noon today to noon CST Friday. The Blizzard Watch is no longer in effect. * TIMING...Snow will spread into the area by midday today, becoming heavy at times this afternoon and evening. Snow should diminish through Friday morning. * ACCUMULATIONS...Storm total snow accumulations averaging 5 to 10 inches are likely, with the heaviest amounts expected near the Missouri River Valley. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 30 mph tonight and Friday, with gusts to near 35 mph at times. Visibility will be reduced to less than a half mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for heavy snow and blowing snow means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous...and visibilities will be limited further due to strong winds blowing snow around. Only travel in an emergency. If you must travel...keep an extra flashlight...food...and water in your vehicle in case of an emergency. && $$ SDZ055-060-061-065-066-068-069-231815- /O.UPG.KFSD.BZ.A.0001.170224T0000Z-170225T0000Z/ /O.NEW.KFSD.WS.W.0003.170223T2100Z-170225T0000Z/ Lake-Hanson-McCook-Hutchinson-Turner-Bon Homme-Yankton- 414 AM CST Thu Feb 23 2017 ...WINTER STORM WARNING IN EFFECT FROM 3 PM THIS AFTERNOON TO 6 PM CST FRIDAY... The National Weather Service in Sioux Falls has issued a Winter Storm Warning for heavy snow and blowing snow, which is in effect from 3 PM this afternoon to 6 PM CST Friday. The Blizzard Watch is no longer in effect. * TIMING...A possible mix of rain and snow this afternoon will change to all snow by this evening. Snow will continue heavy at times tonight, before gradually tapering off Friday morning. * ACCUMULATIONS...Storm total snow accumulations averaging 5 to 10 inches are likely, with the heaviest amounts expected near the Missouri River Valley. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 30 mph tonight and Friday, with gusts to near 35 mph at times. Visibility will be reduced to less than a half mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for heavy snow and blowing snow means severe winter weather conditions are expected or occurring. Significant amounts of snow are forecast that will make travel dangerous...and visibilities will be limited further due to strong winds blowing snow around. Only travel in an emergency. If you must travel...keep an extra flashlight...food...and water in your vehicle in case of an emergency. && $$ SDZ053-054-231815- /O.UPG.KFSD.BZ.A.0001.170224T0000Z-170225T0000Z/ /O.NEW.KFSD.WW.Y.0006.170223T2100Z-170224T1800Z/ Sanborn-Miner- 414 AM CST Thu Feb 23 2017 ...WINTER WEATHER ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO NOON CST FRIDAY... The National Weather Service in Sioux Falls has issued a Winter Weather Advisory for snow and blowing snow, which is in effect from 3 PM this afternoon to noon CST Friday. The Blizzard Watch is no longer in effect. * TIMING...Snow will spread into the area early to mid afternoon, then continue through tonight. Snow should diminish through Friday morning. * ACCUMULATIONS...Storm total snow accumulations averaging 2 to 5 inches are expected. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 30 mph tonight and Friday, with gusts to near 35 mph at times. Visibility will be reduced to a half mile or less at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow and blowing snow means that visibilities will be limited due to a combination of falling and blowing snow. Use caution when traveling...especially in open areas. && $$ SDZ052-231815- /O.UPG.KFSD.BZ.A.0001.170223T1800Z-170225T0000Z/ /O.NEW.KFSD.WW.Y.0006.170223T2100Z-170224T1800Z/ Jerauld- 414 AM CST Thu Feb 23 2017 ...WINTER WEATHER ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO NOON CST FRIDAY... * TIMING...Snow will spread into the area early to mid afternoon, then continue through tonight. Snow should diminish through Friday morning. * ACCUMULATIONS...Storm total snow accumulations averaging 2 to 5 inches are expected. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 30 mph tonight and Friday, with gusts to near 35 mph at times. Visibility will be reduced to a half mile or less at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow and blowing snow means that visibilities will be limited due to a combination of falling and blowing snow. Use caution when traveling...especially in open areas. && $$ SDZ038>040-231815- /O.UPG.KFSD.WS.A.0003.170224T0000Z-170225T0000Z/ /O.NEW.KFSD.WW.Y.0006.170223T2100Z-170224T1800Z/ Beadle-Kingsbury-Brookings- 414 AM CST Thu Feb 23 2017 ...WINTER WEATHER ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO NOON CST FRIDAY... The National Weather Service in Sioux Falls has issued a Winter Weather Advisory for snow and blowing snow, which is in effect from 3 PM this afternoon to noon CST Friday. The Winter Storm Watch is no longer in effect. * TIMING...Snow will spread into the area early to mid afternoon, then continue through tonight. Snow should diminish through Friday morning. * ACCUMULATIONS...Storm total snow accumulations averaging 2 to 5 inches are expected. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 30 mph tonight and Friday, with gusts to near 35 mph at times. Visibility will be reduced to a half mile or less at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow and blowing snow means that visibilities will be limited due to a combination of falling and blowing snow. Use caution when traveling...especially in open areas. && $$ MNZ071-072-231815- /O.EXT.KFSD.BZ.A.0001.170224T0000Z-170225T0000Z/ Lincoln MN-Lyon MN- 414 AM CST Thu Feb 23 2017 ...BLIZZARD WATCH NOW IN EFFECT FROM THIS EVENING THROUGH FRIDAY AFTERNOON... * TIMING...Snow will spread into the area by late this afternoon, then continue through tonight. Snow should diminish through the day Friday. * ACCUMULATIONS...Storm total snow accumulations averaging 1 to 4 inches are expected. * WIND AND VISIBILITY...Winds will increase from the north around 25 to 35 mph tonight and Friday, with gusts of 40 to 45 mph at times. If the falling snow is heavy enough, visibility could be reduced to less than a quarter mile at times, especially while snow is falling. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Blizzard Watch means there is a potential for falling and/or blowing snow with strong winds and extremely poor visibilities. This can lead to whiteout conditions and make travel very dangerous. && $$
What forecasters said that day
The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before this winter storm watch went out at Feb 21, 11:24 AM CST, 4 hours 35 minutes earlier.
Area forecast discussion, Feb 21, 11:24 AM CST, 4 hours 35 minutes before
Area Forecast Discussion National Weather Service Sioux Falls SD 1124 AM CST Tue Feb 21 2017 .SHORT TERM...(Today and Tonight) Issued at 413 AM CST Tue Feb 21 2017 Weak ridge axis settling southward across northwest Iowa early this morning, with moisture from yesterday's rainfall and ideal radiative cooling enough to produce some patchy shallow fog near/east of I-29 favoring mainly lower elevation and southerly upslope locations of the Buffalo ridge. Gradient does continue to increase gradually through the predawn hours, which should start to minimize patchy fog coverage and favor gradually more southward into northwest Iowa. This is similar to treatment by RAP/HRRR solutions through early morning. Beyond the fog early morning, today is shaping up to feature spectacular warmth. Record temperatures are a certainty for many locations with very minimal negative impacts on warming toward upper limits today, with a strong westerly component, minimal cloudiness, and a drier airmass. Highs looking to reach the lower to mid 70s through the Missouri River corridor, gradually decreasing toward mid 60s across southwest Minnesota. Wave riding flattening ridge tonight will glance the far northern portions of the forecast area. A little mid-level frontal support for cloud development the latter half of the night heading north from I-90, but with stout dry layer below, do not expect even any sprinkles to fall from this cloud layer. Should again see a fairly distinct elevation signature to temperatures overnight while in warm sector, as surface gradient relaxes and decouples for lower elevations allows for mid to upper 30s, while slightly stronger winds and higher position in the inversion keeps lower to mid 40s in play along the Buffalo Ridge and toward south central SD. .LONG TERM...(Wednesday through Monday) Issued at 413 AM CST Tue Feb 21 2017 The big story in the medium range forecast continues to be the abrupt change from record highs to a strong winter storm at the end of the week. Wednesday: Shortwave energy zipping through the Northern Plains will bring an enhancement to mid-level clouds, however soundings continue to indicate a very dry subcloud layer. Have kept sprinkles out of the forecast through the morning. A frontal boundary passes through the area early in the day, with cold advection aloft through the afternoon. Temperatures should still rise into the upper 50s to mid 60s along the highway 20 corridor. Thursday-Friday: While model spread continues, overnight models have again trended in different directions, but closer to a bit of a consensus. The latest ECMWF has lifted slightly further north of it's previous run, the GFS has again lifted back northward falling in line and nearly along the mean of the GEFS ensembles. The GEM remains an outlier, both with the open nature of the initial PV anomaly, and the lag in timing with the secondary wave on Friday that will intensify the trough in general. A closer look at the GEFS ensembles allows a bit of a QPF base to be established, as very view members now show the minimal QPF indications of earlier. While there is still considerable spread in the solutions, there are several clusters that focus around the deterministic solutions narrowing in the 25 and 75 percentiles. The GEFS probabilistic guidance has also narrowed considerably over the past 24 hours, with rising and narrowing threshold probabilities indicative of that growing consensus. So have based the forecast on a blend of the GEFS mean, EC and to a lesser degree GFS/GEM. Have generally discounted the 00Z NAM given it's lower skills at extended portions of it's run. The real keys to this forecast revolve around depth of an east-west oriented trough over the Canadian provinces, and stage setter wave on Wednesday that will help determine northward extent or development of the low level baroclinic zone on Thursday. The trend have been to flatten the Canadian trough, allowing Wednesday's wave slide further north over North Dakota/Minnesota. Getting down to the details of the forecast, still strong indications that 700:600 mb frontogenesis will be the initial forcing mechanism that drives precipitation development through the day on Thursday. Of course, we'll be fighting dry air intrusion from the northeast and east at the low levels, and warming surface temperatures. However, all models show that once more intense precipitation begins to fall, surface temperatures cool to support more snow. Areas east of I-29 could be more problematic due to the advection of warmer surface temperatures westward and changeover to snow may linger until the evening. Initial frontogenesis will be reinforced by strong synoptic forcing as a PV anomaly enters the Plains in the evening. As this wave begins to deepen, forcing should shifts toward the 900:800 MB layer. EC/GFS continue to push 850mb low track slightly further north overnight now along a Lincoln to Des Moines to La Crosse into mid-day Friday. This would keep the large deformation band stalled across and south of a line from Yankton to Windom. Winds will complicate matters with this storm, and as the surface low shifts ever so slightly northward, so will the strongest gradient winds. Have bumped up sustained winds to 25 to 30 mph with gusts potential up to 40-45 mph based on low level flow on the west side of this system. Have placed blowing snow in grids once snow is on the ground. The initial snow accumulation projections continue to focus the highest risk of 6" inches south of Interstate 90, with the greatest risk of 8 or more inches in parts of Northwest Iowa and adjacent areas of Southern Minnesota trailing westward along the Missouri River. Further north, a tight snow gradient may once again form due to the northerly fetch of dry air. Will not be issuing a winter storm watch at this time, but one may likely be needed later today. Next Weekend: High pressure slides in behind this system, and have lowered daily highs to account for new snow cover. There's still some potential for light precipitation Monday into Tuesday, but this continues to be a minor impact. && .AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon) Issued at 1123 AM CST Tue Feb 21 2017 VFR will prevail through midday Wednesday. && .FIRE WEATHER... Issued at 413 AM CST Tue Feb 21 2017 A drying of the airmass today will occur with a better westerly component to winds. Diurnal mixing will allow humidity levels to drop to 20 to 25 percent by early to mid afternoon through the Missouri River corridor, with increasing westerly winds at a gusty 15 to 30 mph. Conditions should stay shy of critical with only an hour or two of lowest humidity, and winds remaining generally below 25 mph, but enough to reach a very high rangeland fire danger through the Missouri River Corridor eastward through northwest Iowa. While it will be cooler on Wednesday, there will still be potential for a very high fire danger toward Lower Brule locations with humidity 25 to 35 percent and northwest winds 15 to 25 mph. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...None. MN...None. IA...None. NE...None. && SHORT TERM...Chapman LONG TERM...Dux AVIATION...MJ FIRE WEATHER...Chapman
Hazardous weather outlook, Feb 21, 4:12 AM CST, 11 hours 47 minutes before
Hazardous Weather Outlook National Weather Service Sioux Falls SD 412 AM CST Tue Feb 21 2017 IAZ001>003-012>014-021-022-MNZ071-072-080-081-089-090-097-098- SDZ038>040-052>056-059>062-067-221015- Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Cherokee- Buena Vista-Lincoln MN-Lyon MN-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Beadle-Kingsbury-Brookings-Jerauld-Sanborn-Miner- Lake-Moody-Davison-Hanson-McCook-Minnehaha-Lincoln SD- 412 AM CST Tue Feb 21 2017 This Hazardous Weather Outlook is for portions of northwest Iowa, southwest Minnesota, central South Dakota, east central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight Patchy dense fog will be possible through the early morning hours. Visibilities under one mile may be possible, especially across areas of southwest Minnesota and adjacent areas of Iowa and South Dakota. .DAYS TWO THROUGH SEVEN...Wednesday through Monday A strong storm system is expected to enter the Plains by Thursday bringing accumulating snow to the region. At this time, a band of moderate to heavy snow accumulations greater than six inches will be possible. However, the track of this storm is still uncertain and this could impact the location of heavy snow amounts. Continue to monitor your local forecast. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. IAZ020-031-032-NEZ013-014-SDZ050-057-058-063>066-068>071-221015- Plymouth-Woodbury-Ida-Dixon-Dakota-Gregory-Brule-Aurora- Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton-Clay SD- Union- 412 AM CST Tue Feb 21 2017 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, northeast Nebraska, south central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight Gusty winds and near record temperatures will lead to very high fire danger risks this afternoon along the Missouri River Valley. Outdoor burning should be avoided and extra caution with off road vehicles. .DAYS TWO THROUGH SEVEN...Wednesday through Monday A strong storm system is expected to enter the Plains by Thursday bringing accumulating snow to the region. At this time, a band of moderate to heavy snow accumulations greater than six inches will be possible. However, the track of this storm is still uncertain and this could impact the location of heavy snow amounts. Continue to monitor your local forecast. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
Nearby
Winter Storm Watches in South Dakota, 2017Winter Storm Watches in Iowa, 2017Winter Storm Watches in Minnesota, 2017Every winter storm watch in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.